What it is about?

It is very common to develop a website without thinking about the resources of the server where it will be hosted, if the development is not optimized it will surely work when it has no load or is in testing stages, but at times when visitors begin to grow the site will lose speed, will be offline or will generate a very high cost.

Of course there are tools that help to optimize the site, but usually when the problems arrive there is no time to investigate and learn.